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80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Copyright (C) 2020 Intel Corporation
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#ifndef OPENCV_GAPI_GSTREAMING_META_HPP
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#define OPENCV_GAPI_GSTREAMING_META_HPP
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#include <opencv2/gapi/gopaque.hpp>
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#include <opencv2/gapi/gcall.hpp>
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#include <opencv2/gapi/gkernel.hpp>
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#include <opencv2/gapi/gtype_traits.hpp>
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namespace cv {
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namespace gapi {
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namespace streaming {
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// FIXME: the name is debatable
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namespace meta_tag {
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static constexpr const char * timestamp = "org.opencv.gapi.meta.timestamp";
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static constexpr const char * seq_id = "org.opencv.gapi.meta.seq_id";
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} // namespace meta_tag
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namespace detail {
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struct GMeta {
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static const char *id() {
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return "org.opencv.streaming.meta";
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}
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// A universal yield for meta(), same as in GDesync
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template<typename... R, int... IIs>
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static std::tuple<R...> yield(cv::GCall &call, cv::detail::Seq<IIs...>) {
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return std::make_tuple(cv::detail::Yield<R>::yield(call, IIs)...);
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}
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// Also a universal outMeta stub here
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static GMetaArgs getOutMeta(const GMetaArgs &args, const GArgs &) {
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return args;
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}
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};
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} // namespace detail
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template<typename T, typename G>
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cv::GOpaque<T> meta(G g, const std::string &tag) {
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using O = cv::GOpaque<T>;
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cv::GKernel k{
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detail::GMeta::id() // kernel id
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, tag // kernel tag. Use meta tag here
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, &detail::GMeta::getOutMeta // outMeta callback
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, {cv::detail::GTypeTraits<O>::shape} // output Shape
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, {cv::detail::GTypeTraits<G>::op_kind} // input data kinds
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, {cv::detail::GObtainCtor<O>::get()} // output template ctors
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};
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cv::GCall call(std::move(k));
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call.pass(g);
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return std::get<0>(detail::GMeta::yield<O>(call, cv::detail::MkSeq<1>::type()));
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}
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template<typename G>
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cv::GOpaque<int64_t> timestamp(G g) {
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return meta<int64_t>(g, meta_tag::timestamp);
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}
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template<typename G>
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cv::GOpaque<int64_t> seq_id(G g) {
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return meta<int64_t>(g, meta_tag::seq_id);
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}
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template<typename G>
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cv::GOpaque<int64_t> seqNo(G g) {
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// Old name, compatibility only
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return seq_id(g);
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}
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} // namespace streaming
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} // namespace gapi
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} // namespace cv
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#endif // OPENCV_GAPI_GSTREAMING_META_HPP
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